A5050407615- Contact Mechanics and Variational Inequalities
- Metallic Glasses and Amorphous Alloys
- Advanced Mathematical Modeling in Engineering
- Microstructure and mechanical properties
- Stability and Controllability of Differential Equations
- Elasticity and Material Modeling
- Magnetic properties of thin films
- Solidification and crystal growth phenomena
- Hydrogen Storage and Materials
- Thermoelastic and Magnetoelastic Phenomena
- Numerical methods in engineering
- Magnetic Properties and Applications
- Shape Memory Alloy Transformations
- Theoretical and Computational Physics
- Intermetallics and Advanced Alloy Properties
- Topology Optimization in Engineering
- Advanced Thermodynamics and Statistical Mechanics
- Ammonia Synthesis and Nitrogen Reduction
- Mechanical stress and fatigue analysis
- Aluminum Alloy Microstructure Properties
- Physics of Superconductivity and Magnetism
- Aluminum Alloys Composites Properties
- Magnetic Properties and Synthesis of Ferrites
- Numerical methods in inverse problems
- High-Velocity Impact and Material Behavior
University of Pavia
2010-2024
University of Milan
2015-2024
Politecnico di Milano
2023-2024
University of Vienna
2023-2024
University of Bologna
2005-2021
Istituto di Matematica Applicata e Tecnologie Informatiche
2015-2020
Istituto Ortopedico Rizzoli
2017
National Interuniversity Consortium for the Physical Sciences of Matter
2006-2013
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
1989-2005
John Brown University
2003-2004
The low-temperature magnetic properties of samples obtained by cold-compacting core-shell Fe/Fe oxide nanoparticles have been investigated, and their dependence on the structure, composition, mean particle size D has discussed. Samples with different D, varying from 6 to 15 nm, Fe ratio were analyzed means transmission electron microscopy, x-ray diffraction, magnetization measurements in 5--300-K temperature range. results support existence a (below ${T}_{1}\ensuremath{\sim}20\mathrm{K})$...
Nanocrystalline Fe powder was synthesized by mechanical-energy high-transfer technique (ball milling). By varying the duration of mechanical attrition, with grain sizes in 8--25 nm range produced. The nanocrystalline material exhibits a two-components M\"ossbauer spectrum due to presence two phases: crystallites and grain-boundary region among them. In particular, boundaries give rise distribution hyperfine magnetic fields typical an amorphouslike configuration. structural features iron...
Microstructure refinement and synergic coupling among different phases are currently explored strategies to improve the hydrogen storage properties of traditional materials. In this work, we apply a combination these methods synthesize Mg–Pd composite nanoparticles by inert gas condensation Mg vapors followed vacuum evaporation Pd clusters. Irreversible formation Mg6Pd intermetallic phase takes place upon annealing, resulting in Mg/Mg6Pd nanoparticles. Their investigated connected undergoing...
In this paper, a phase-field approach for structural topology optimization 3D-printing process which includes stress constraints and potentially multiple materials or multiscales is analyzed. First-order necessary optimality conditions are rigorously derived numerical algorithm implements the method presented. A sensitivity study with respect to some parameters conducted two-dimensional cantilever beam problem. Finally, possible workflow obtain 3D-printed object from solutions described...
We measured the vibrational density of states (DOS) nanocrystalline $\ensuremath{\alpha}\ensuremath{-}\mathrm{Fe}$ by nuclear inelastic scattering synchrotron radiation. Specimens prepared inert gas condensation with different crystallite sizes and oxide contents have been investigated. An enhanced population low-energy modes arises from high fraction interfacial sites connected small size. Oxidation similarly contributes to DOS but additionally brings about stiff above high-frequency cutoff...
Abstract In this paper, we analyze a contact problem with irreversible adhesion between viscoelastic body and rigid support. On the basis of Frémond's theory, detail derivation model resulting partial differential equation system. Hence, prove existence global in time solutions (to suitable variational formulation) related Cauchy by means an approximation procedure, combined monotonicity compactness tools, prolongation argument. fact approximate (for which local well‐posedness result) models...
Mg nanoparticles with metal-oxide core-shell morphology were synthesized by inert-gas condensation and decorated in situ Pd deposition. Transmission electron microscopy x-ray diffraction underline the formation of a noncontinuous layer clusters on top MgO shell. Even presence thick interlayer, modest (2 at. %) decoration deeply enhances hydrogen sorption properties: previously inert exhibit metal-hydride transformation fast kinetics gravimetric capacity above 5 wt %.
The hydrogen sorption kinetics of magnesium nanoparticles prepared by inert gas condensation and coated a oxide layer were investigated volumetric apparatus. metal-hydride transformation was studied transmission electron microscopy the both in as-prepared state after cycling. In small (≈35 nm) hydride formation proceeds one-dimensional growth controlled diffusion through hydride, while reverse to metal involves interface-controlled three-dimensional nuclei formed at constant rate. Large...
Nanocrystalline Fe3O4 and a composite system constituted by nanocrystalline Fe have been synthesized ball-milling commercial magnetite an equimolar mixture of iron powders. The physical parameters governing the milling process strictly controlled so as to achieve state precursor material avoid chemical reactions. X-ray diffraction Mössbauer spectroscopy measurements carried out both on as-milled powders samples previously subjected annealing treatments in 100–600 °C temperature range....